------------------------------ UNITED STATES OMB APPROVAL SECURITIES AND EXCHANGE COMMISSION ------------------------------ Washington, D.C. 20549 OMB Number 3235-0145 ------------------------------ Expires: February 28, 2009 ------------------------------ Estimated average burden hours per response . . . 11 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.1) Cantel Medical Corp. ------------------------------------------------------------------------------- (Name of Issuer) Common Stock ------------------------------------------------------------------------------- (Title of Class of Securities) 138098108 ------------------------------------------------------------------------------- (CUSIP Number) December 31, 2006 ------------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: |x| Rule 13d-1(b) Rule 13d-1(c) Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). PAGE 1 OF 9 PAGES ---------------------- --------------------- CUSIP No. 138098108 13G Page 2 of 9 Pages ---------------------- --------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only). Manulife Financial Corporation ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| N/A ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Canada ------------------------------------------------------------------------------- 5 SOLE VOTING POWER -0- -------------------------------------------------------- Number of 6 SHARED VOTING POWER Shares Beneficially -0- Owned by -------------------------------------------------------- Each 7 SOLE DISPOSITIVE POWER Reporting Person -0- With -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None, except through its indirect, wholly-owned subsidiaries, MFC Global Investment Management (U.S.A.) Limited, John Hancock Advisers, LLC and John Hancock Life Insurance Company -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* N/A -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 See line 9 above. -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* HC -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! PAGE 2 OF 9 PAGES ---------------------- --------------------- CUSIP No. 138098108 13G Page 3 of 9 Pages ---------------------- --------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only). MFC Global Investment Management (U.S.A.) Limited ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| N/A ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Canada ------------------------------------------------------------------------------- 5 SOLE VOTING POWER 1,235 -------------------------------------------------------- Number of 6 SHARED VOTING POWER Shares Beneficially -0- Owned by -------------------------------------------------------- Each 7 SOLE DISPOSITIVE POWER Reporting Person 1,235 With --------------------------------------------------------- 8 SHARED DISPOSITIVE POWER -0- ------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,235 ------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* N/A ------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.01% ------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IA ------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! PAGE 3 OF 9 PAGES ---------------------- --------------------- CUSIP No. 138098108 13G Page 4 of 9 Pages ---------------------- --------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only). John Hancock Advisers, LLC ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| N/A ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- 5 SOLE VOTING POWER 157,300 -------------------------------------------------------- Number of 6 SHARED VOTING POWER Shares Beneficially -0- Owned by -------------------------------------------------------- Each 7 SOLE DISPOSITIVE POWER Reporting Person -0- With --------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 157,300 ------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 157,300 ------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* N/A ------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 1.02% ------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IA ------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! PAGE 4 OF 9 PAGES ---------------------- --------------------- CUSIP No. 138098108 13G Page 5 of 9 Pages ---------------------- --------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only). John Hancock Life Insurance Company ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| N/A ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Commonwealth of Massachusetts ------------------------------------------------------------------------------- 5 SOLE VOTING POWER -0- -------------------------------------------------------- Number of 6 SHARED VOTING POWER Shares Beneficially 60,600 Owned by -------------------------------------------------------- Each 7 SOLE DISPOSITIVE POWER Reporting Person -0- With --------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 60,600 ------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 60,600 ------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* N/A ------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.39% ------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IA ------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! PAGE 5 OF 9 PAGES Attention: Intentional misstatements or omissions of fact constitute Federal criminal violations (See 18 U.S.C. 1001) Item 1(a) Name of Issuer: Cantel Medical Corp. Item 1(b) Address of Issuer's Principal Executive Offices: 150 Clove Road Little Falls, New Jersey 07424 Item 2(a) Name of Person Filing: This filing is made on behalf of Manulife Financial Corporation ("MFC"), and MFC's indirect, wholly-owned subsidiaries, MFC Global Investment Management (U.S.A.) Limited ("MFC Global"), John Hancock Advisers, LLC ("JHA") and John Hancock Life Insurance Company ("JHLICO"). Item 2(b) Address of the Principal Offices: The principal business offices of MFC and MFC Global are located at 200 Bloor Street, East, Toronto, Ontario, Canada, M4W 1E5; and JHA and JHLICO are located at 601 Congress Street, Boston, Massachusetts 02210. Item 2(c) Citizenship: MFC and MFC Global are organized and exist under the laws of Canada. JHA is organized and exists under the laws of the State of Delaware. JHLICO is organized and exists under the laws of the Commonwealth of Massachusetts. Item 2(d) Title of Class of Securities: Common Stock Item 2(e) CUSIP Number: 138098108 Item 3 If the Statement is being filed pursuant to Rule 13d-1(b), or 13d-2(b), check whether the person filing is a: MFC: (g) (X) Parent Holding Company, in accordance with ss.240.13d-1(b)(ii)(G). MFC Global: (e) (X) Investment Adviser registered under ss.203 of the Investment Advisers Act of 1940. JHA: (e) (X) Investment Adviser registered under ss.203 of the Investment Advisers Act of 1940. JHLICO: (e) (X) Investment Adviser registered under ss.203 of the Investment Advisers Act of 1940. Item 4 Ownership: (a) Amount Beneficially Owned: MFC Global has beneficial ownership of 1,235 shares of Common Stock, JHA has beneficial ownership of 157,300 shares of Common Stock and JHLICO has beneficial ownership of 60,600 shares of Common Stock. Through its parent-subsidiary relationship to MFC Global, JHA and JHLICO, MFC may be deemed to have beneficial ownership of these same shares. PAGE 6 OF 9 PAGES (b) Percent of Class: Of the 15,483,821 shares outstanding as of November 30, 2006, according to the issuer's quarterly report on form 10-Q for the period ended October 31, 2006, MFC Global held 0.01%, JHA held 1.02% and JHLICO held 0.39%. The aggregate percentage held as of December 31, 2006 by all reporting persons was 1.42%. (c) Number of shares as to which the person has: (i) sole power to vote or to direct the vote: MFC Global and JHA each has sole power to vote or to direct the voting of the shares of Common Stock beneficially owned by each of them. (ii) shared power to vote or to direct the vote: JHLICO has shared power to vote or to direct the voting of the shares of Common Stock it beneficially owns. (iii)sole power to dispose or to direct the disposition of: MFC Global has sole power to dispose or to direct the disposition of the shares of Common Stock it beneficially owns. (iv) shared power to dispose or to direct the disposition of: JHA and JHLICO each has shared power to dispose or to direct the disposition of the shares of Common Stock beneficially owned by each of them. Item 5 Ownership of Five Percent or Less of a Class: If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following {X}. Item 6 Ownership of More than Five Percent on Behalf of Another Person: Not applicable. Item 7 Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company: See Items 3 and 4 above. Item 8 Identification and Classification of Members of the Group: Not applicable. Item 9 Notice of Dissolution of a Group: Not applicable. Item 10 Certification: By signing below the undersigned certifies that, to the best of its knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. PAGE 7 OF 9 PAGES SIGNATURE After reasonable inquiry and to the best of its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct. Manulife Financial Corporation By: /s/ Scott A. Lively Name: Scott A. Lively Dated: February 7, 2007 Title: Attorney in Fact* MFC Global Investment Management (U.S.A) Limited By: /s/ Gordon Pansegrau Name: Gordon Pansegrau Dated: February 7, 2007 Title: General Counsel, Chief Compliance Officer & Secretary John Hancock Advisers, LLC By: /s/ Francis V. Knox Jr. Name: Francis V. Knox Jr. Dated: February 7, 2007 Title: Vice President and Chief Compliance Officer John Hancock Life Insurance Company By: /s/ Scott A. Lively Name: Scott A. Lively Dated: February 7, 2007 Title: Attorney in Fact** * Signed pursuant to a Power of Attorney dated January 31, 2007 included as an Exhibit to Schedule 13G filed with the Securities and Exchange Commission by Manulife Financial Corporation on February 1, 2007. ** Signed pursuant to a Power of Attorney dated January 31, 2007 included as an Exhibit to Schedule 13G filed with the Securities and Exchange Commission by Manulife Financial Corporation on February 7, 2007. PAGE 8 OF 9 PAGES EXHIBIT A JOINT FILING AGREEMENT ---------------------- Manulife Financial Corporation, MFC Global Investment Management (U.S.A.) Limited, John Hancock Advisers, LLC and John Hancock Life Insurance Company agree that the Terminated Schedule 13G (Amendment No. 1) to which this Agreement is attached, relating to the Common Stock of Cantel Medical Corp., is filed on behalf of each of them. Manulife Financial Corporation By: /s/ Scott A. Lively Name: Scott A. Lively Dated: February 7, 2007 Title: Attorney in Fact* MFC Global Investment Management (U.S.A) Limited By: /s/ Gordon Pansegrau Name: Gordon Pansegrau Dated: February 7, 2007 Title: General Counsel, Chief Compliance Officer & Secretary John Hancock Advisers, LLC By: /s/ Francis V. Knox Jr. Name: Francis V. Knox Jr. Dated: February 7, 2007 Title: Vice President and Chief Compliance Officer John Hancock Life Insurance Company By: /s/ Scott A. Lively Name: Scott A. Lively Dated: February 7, 2007 Title: Attorney in Fact** * Signed pursuant to a Power of Attorney dated January 31, 2007 included as an Exhibit to Schedule 13G filed with the Securities and Exchange Commission by Manulife Financial Corporation on February 1, 2007. ** Signed pursuant to a Power of Attorney dated January 31, 2007 included as an Exhibit to Schedule 13G filed with the Securities and Exchange Commission by Manulife Financial Corporation on February 7, 2007. PAGE 9 OF 9 PAGES